The first time the wrens sang at night was three years ago, when I used a rusty saw to cut off Pa’s left foot. The birds drowned out his screams. Wrens don’t normally sing after sunset, but I wasn’t surprised by it. Birds are known as spirit carriers in mountain lore. When someone dies, birds of all kinds carry them back and forth between this world and the afterlife, so folk can keep watch over their living loved ones, even after they’re gone.